Dr Jonathan Katz
MBBChir MD FRCP
34 years of experience
Bushey, WD23 1RD
(+3 more)
47 connections in healthcare
Skill endorsed
by Dr Melanie Romain, Dr Felicity Kaplan and 4 other professionals
34 years of experience
Bushey, WD23 1RD
(+3 more)
47 connections in healthcare
Skill endorsed
by Dr Melanie Romain, Dr Felicity Kaplan and 4 other professionals
Areas of expertise
Contact
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About Dr Jonathan Katz
Dr Jonathan Katz is a Consultant in Diabetes & Endocrinology, based at Barnet Hospital, which is part of the The Royal Free London NHS Trust. He has over 30 years experience in treating patients with Thyroid problems, Pituitary disorders, Diabetes and other hormone imbalances including Calcium disorders, Menopause, Testosterone Deficiency and Addison's Disease.
Dr Katz studied medicine at Cambridge University and University College London, qualifying in 1991. He specialised in Endocrinology, completing registrar training at UCLH, the Whittington Hospital and the Royal Free Hospital. During higher training he undertook a two year research fellowship for his MD thesis on polycystic ovary syndrome. Following that, he worked for 1 year as a registrar in Sydney, Australia before returning to teh Royal Free Hospital for his final resgistrar year. Dr Katz was appointed as a Consultant in Diabetes and Endocrinology in 2002.
Dr Katz works as a Consultant Endocrinologist for the Royal Free London NHS Foundation Trust, based at Barnet Hospital. In 2009, he was elected as a Fellow of the Royal College of Physicians (FRCP), an honour granted to consultants providing the highest standards of care. In 2019, Dr Katz was appointed as Regional Advisor for the Royal College of Physicians – this is an elected post with wider responsibilities : supporting training, ensuring new consultant posts fulfil Royal College standards, chairing regional conference updates for physicians and appointing College Tutors.
Dr Katz has a busy NHS Endocrinology practice, seeing over 300 new patients and over 1000 follow-up patients each year. In addition, he looks after inpatients at Barnet Hospital with diabetes emergencies and acute endocrine disorders.
Subspecialties
- Diabetes
- Endocrinology
Areas of expertise
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Registered with
General Medical Council
No. 3490022
Education
University of Cambridge
Medicine
Graduated 1991
Qualifications
- MB BChir - Cambridge University 1991
- MD - University of London 2001
- FRCP - Royal College of Physicians 2009
Languages spoken
- English
Insurers
- General and Medical
- Freedom Health Insurance
- The Exeter
- Simply Health (Dental)
- Healix Health Services
- Cigna
- Bupa
- WPA
- Allianz Worldwide Care
- AXA Health
- Aviva Health
- Vitality
- The PHC
- Benenden Health
Fees
New appointment
£295Follow-up appointment
£195
Locations
Spire Bushey Hospital
Heathbourne Road, Bushey, United Kingdom, WD23 1RD
Opening hours
Facilities
Opening hours
Facilities
The Kings Oak Hospital (part of Circle Health Group)
Chase Farm, Enfield, United Kingdom, EN28SD
Opening hours
Facilities
The Cavell Hospital (part of Circle Health Group)
Cavell Drive, Uplands Park Rd, Enfield, London, United Kingdom, EN2 7PR
Opening hours
Facilities
Spire Bushey Diagnostic Centre
290 Centennial Ave, Elstree Borehamwood, London, United Kingdom, WD6 3SU
Opening hours
Areas of expertise
Contact
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Reviews
AI Review Summary
This summary was created by AI based on recent reviews
Dr Jonathan Katz is professional and thorough, taking time to listen and explaining everything clearly. Patients value his deep knowledge and kind approach, which puts their concerns at ease and provides excellent care. He helps them understand their diagnoses for conditions like thyroid issues and diabetes, including managing blood test results. Many patients highlight Dr Katz's successful management of various hormone disorders.
Dr Katz does not rush you he takes his time to explain and is very thorough.
Incredibly thorough and explains everything in an easy to understand way. I'm really glad I was able to get Dr.Katz expertise.
I cannot recommend Dr Katz highly enough. After being referred to someone else and waiting weeks for what was an urgent matter, the difference in care was remarkable. As soon as I was referred to him, he personally called me on my mobile — something I have never experienced from a doctor before. He is incredibly caring, knowledgeable, and attentive, and he took the time to listen and explain everything clearly. From the very first interaction, I felt genuinely looked after and taken seriously. He is simply brilliant, and I’m extremely grateful for the care and support he provided.
A very professional and warm welcome into his consultation room.Took time to listen to my concerns about my medications and any concerns I had about complcations or the progress of my diabetes Fully explained carefully monitoring my blood sugars to evaluate whether I was on the optimal medication and correct doses and whether there was at present any need for any further investigations. I was indeed very satisfied with my visit and appropriate follow up with blood results was arranged. I will have no hesitation in recommending him for his diabetes care of patients.
Good experience and was given all the information I needed by Dr.Katz to understand my medical issue and treatment
I have always found Dr Katz provides good care and advice. I see him for treatment of my overactive thyroid (Graves Disease) and he also looks after my father who has type 2 Diabetes . We have always been happy with the care we have received.
Dr Katz was very professional and personable. I came to him for a series of tests and he put my concerns at rest. I will for sure come back to him if ever I need to in the future. Thank you, Mrs J
I had a very positive experience with Dr. Katz. He explained everything clearly and took the time to ensure I understood my condition and the treatment options. He was extremely patient and made me feel comfortable asking questions. I also really appreciated how promptly he responded to emails which made communication easy and reassuring. Overall, a very professional, knowledgeable and caring doctor. I would highly recommend him.
Dr Katz is an excellent Doctor - he is extremely responsive, helpful, thorough and professional and I would trust his judgement 100%
Skill Endorsements
Dr Katz is an excellent and knowledgeable endocrinologist who I have known for many years. I would not hesitate to recommend him
03 Jun 2026
Dr Melanie Romain
Geriatric DoctorI have known Dr Katz for many years and can say with confidence that he is a skilled, trustworthy endocrinologist
19 May 2026DK
Dr Felicity Kaplan
Diabetes & Endocrinology SpecialistDr Katz consistently provides a top tier opinion on all aspects of endocrinology and diabetes. He has excellent clinical skills and patients I have referred him always receive great care. I have no hesitation in recommending him.
09 Apr 2026
Dr Kwok Tang
GastroenterologistJonathan is an excellent clinical colleague and diabetic specialist who I have known for over 20 years. He is a top opinion on a wide range of endocrine conditions and has a warm, thoughtful and caring approach to his patients.
30 Jan 2026
Dr James Rakshi
Neurologist
Get to know Dr Jonathan Katz
FAQ
What are Dr Jonathan Katz's reviews like?
Dr Jonathan Katz's overall patient rating is 5 out of 5 stars on Doctify. This is based on 34 reviews.
What languages does Dr Jonathan Katz speak?
Dr Jonathan Katz speaks English
Where is Dr Jonathan Katz located?
Dr Jonathan Katz primarily practices at Spire Bushey Hospital, located at Heathbourne Road, Bushey, United Kingdom, WD23 1RD
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What are Dr Jonathan Katz working hours?
Dr Jonathan Katz is working Wednesday (16:00 - 18:00), Thursday (15:00 - 17:00)
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Does Dr Jonathan Katz accept new patients?
Dr Jonathan Katz generally accepts new patients.
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